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STUDIES ON THE PERFORMANCE OF ONION (Allium cepa L.) VARIETIES IN COASTAL REGION OF ANDHRA PRADESH

KrishiKosh

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Title STUDIES ON THE PERFORMANCE OF ONION (Allium cepa L.) VARIETIES IN COASTAL REGION OF ANDHRA PRADESH
 
Creator P.V.RAMESH BABU
 
Contributor Dr.L. NARAM NAIDU
 
Subject neck thickness ,yield attributes,vertical bulb ,vegetative growth
 
Description An experiment was carried out during the rabi 2010-2011 at Horticultural Research Station (APHU), Venkataramannagudem, West Godavari district, A.P. with an objective of identifying a suitable onion variety to coastal region of Andhra Pradesh. The experiment was laid out in a randomized block design (RBD) with three replications and data on growth, yield, yield attributes and quality of nine onion cultivars were recorded and statistically analyzed.
The plant height of different varieties recorded at various stages of crop growth differed significantly. Though all the varieties were uniform during the initial stages of crop growth (15, 30 DAT), the cv. Arka Niketan was significantly superior recording maximum plant height at 60 DAT (31.60 cm) and 90 DAT (42.60 cm) whereas Multiplier onion recorded minimum plant height at all stages of growth.
The number of leaves per plant at successive growth stages differed significantly among the varieties. Highest number of leaves at 30 DAT (5.66), 60 DAT (10.6) and at 90 DAT (12.06) were recorded by Multiplier onion while the lowest were recorded by Agrifound Light Red at all the growth stages. Leaf area and leaf area index (LAI) were significantly influenced by varieties. At all stages of crop growth significantly maximum leaf area was recorded by Arka Niketan, whereas, the cv. Multiplier onion recorded the minimum leaf area and leaf area index.
The neck thickness was maximum in cv. Arka Kalyan (1.21cm) followed by cv. Agrifound Rose (1.19 cm) while the lowest neck thickness was recorded in cv. Multiplier onion (0.73 cm). Significantly the longest crop duration was recorded by cv. Agrifound Light Red (140 days) followed by cv. N-53 (136 days). The cv. Multiplier onion was the earliest with crop duration of 98 days from planting to harvest.
Significant differences were observed among the varieties in respect of yield attributes such as horizontal and vertical bulb diameter, weight of the bulb and bulb yield. Maximum values for the above parameters were recorded by cv. Arka Niketan (25.47t/ha) followed by Arka Kalyan (24.01t/ha). The minimum values for yield attributes and yield per hectare were recorded by cv. Multiplier onion.
Total soluble solids (TSS), sugars (total, reducing and non reducing) in the bulbs were significantly influenced by the different varieties. The TSS (0Brix) and total sugars (%) were high in Arka Niketan (11.35 and 6.41). The non reducing sugars were maximum in cv. N-53 (2.33) while the highest ascorbic acid content was observed in cv. Arka Kalyan (10.67 mg/100 g).
Vegetative growth in terms of plant height, leaf area and leaf area index were positively associated with bulb weight and yield while the mean bulb weight showed significant positive correlation with yield.
Keeping in view the overall performance of different varieties in terms of vegetative growth, yield and quality of the bulbs, the cultivars Arka Niketan and Arka Kalyan were found superior and have been identified as suitable varieties for coastal region of Andhra Pradesh.
 
Date 2016-07-22T16:03:02Z
2016-07-22T16:03:02Z
2011-11
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69429
 
Language en
 
Format application/pdf
 
Publisher ANDHRA PRADESH HORTICULTURAL UNIVERSITY